Outlook 2013 mark email as read

I really like using Outlook 2013 but there was one niggly little issue that was annoying me.

Everytime I viewed an email and it displayed in the Viewing Pane the email was still marked as unread. To mark it as read I had to either right click on it to mark it as read or click onto another email.

I didn't like either of these solutions so I went looking for an option to mark an email as read as soon as I viewed it in the reading pane.

In Outlook 2013 click on the blue 'File' option in the top left corner.